90389028 has 12 divisors (see below), whose sum is σ = 210907760. Its totient is φ = 30129672.

The previous prime is 90388997. The next prime is 90389071. The reversal of 90389028 is 82098309.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3766198 + ... + 3766221.

Almost surely, 2^90389028 is an apocalyptic number.

It is an amenable number.

90389028 is an abundant number, since it is smaller than the sum of its proper divisors (120518732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90389028 is a wasteful number, since it uses less digits than its factorization.

90389028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7532426 (or 7532424 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 90389028 is about 9507.3144473085. The cubic root of 90389028 is about 448.7852472424.

The spelling of 90389028 in words is "ninety million, three hundred eighty-nine thousand, twenty-eight".